EE WAS PLUMBING IN A SINK W/QUEST PIPEING AT THE FILTER PLANT. THE PIPE WAS TOO LONG. EE COULD NOT GET A HACK SAW IN THE SPACE BECAUSE IT WAS A SMALL SPACE. EE TRIED TO CUT THE PIPE W/A POCKET KNIFE. THE KNIFE SLIPPED & CUT LEFT PALM OF HAND JUST BELOW THE THUMB. EE WAS TAKEN TO THE COMPANY DR WHERE HE RECEIVED 6 STITCHES.